James j



(No Model.) J. J. HICKS.

GLINIGAL THERMOMETER.

No. 280,037. 1 Patented June 26,1883.

4 i SIS N. PETERS PPPP LMlmphnr. Wzlhillgwll. D. C.

. UNITED STATES VPATENT OFFICE.

JAMES J. I-IICKS, OF HATTON GARDEN, COUNTY OE MIDDLESEX, ENGLAND.

CLINICAL THERMOMETER.

SPECIFICATION forming'part of Letters Patent No. 280,037', dated June 26, 1883.

To all whom it may concern:

Beit known that I, J AMES JosEFI-I Hicks, a subject of the Queen of Great Britain, residing at I-Iatton Garden, inthe county of MiddleseX, England, meteorological-instrument manufacturer, `have invented certain new and useful Improvements in Thermometers, of

which the following is a specification.

certificate, or a copy thereof which may havev been entered in a book, has to be consulted and the errors added to or subtracted from the observed scale-reading. This is a troublesome operation, as it involves reference to the certificate of correction or to a Copy thereof, which possibly may not at the time be within reach or may be lost. I obviate this difficulty by etching or otherwise marking the errors on the thermometer-tube itself, as shown by the accompanying drawing, which represents the surface of a thermometer-tube opened out dat,

and shows the scale and number usually applied thereto, and the corrections to be made in the scale-readings, together with the Kew Observatory monogram and number b. The lower figures, c, 90-5, 10Q-5, and 110,with the vApplication iiled January 18, 1882. (No model.) y

scale, are, as usual7 etched or otherwise marked on the thermometer-tube before its eXamina- 4o tion with the standard instrument. Then, after the instrument has been examined, the corrections c, which, in the example shown in the drawing, are +0.2 at 90, +0.1 at 95, +0.1 at 100, +0.() at 105, and +0.1at 110. In this case ,45 all the corrections are in the shape of additions; but in some cases they are in the form of subtractions when the sign indicating minus is employed. The Kew Observatory monogram and number are K. O. 4 187 5 but the num- 5o ber and monogram or other sign of any other examination-office at which the thermometer has been compared with the standard instrument may be applied to the thermometer in lieu thereof. By thes'e means the thermometer 55 carries with it the corrections found to be necessary, thereby greatly enhancing its utility, as the correct reading can be at once obtained by reference to the thermometer alone.

Having thus described my invention, the fol- 6o lowing is what I claim as new therein and desire to secure by Letters Batent:

1. A clinical 'thermometer having, in combination with the scale and ordinary figures etched or otherwise marked thereon, the Cor- 65' rections of the examining-office, substantially as shown and described. y

2. A thermometer-tube having the corrections ofthe examining-office marked thereon, in addition to the ordinary scale-readings, as 7o set forth.

JAS. J. HICKS.

Witnesses:

ALFRED H. J oNEs, O. M. VIIITE. y 

